Tentering frame for the wet treatment of fabrics



May 17, 1 932. E, SICHAERER 1 ,858,970

TENTERING FRAME FOR THE WET TREATMENT OF FABRICS Filed July 28, 1930 Sheets-Sheet I 31 Z. /6. 17 1/ /7 11 24 Z5 1 I A; a /6 l2 7 I Z2 Z2 Z3 Q Q x s 5 Q Emil Sdzaerer Patented May 17, 1932 PATENT OFFICE v EMIL SGHAERER, OF GOLIDAOH, SWITZERLAND TENTERING FRAME FOR THE WET TREATMENT OF FABRICS Application filed July 28, 1930, Serial No.

The present invention relates to improvements in tentering frames for the wet-treatment of fabrics, such as dyeing, bleaching, creping and the like, and towhich the fabric is pinned in zig-zag fashion along one of its edges. In the known frames of this type the distance between the bars supporting the pin carriers cannot be altered. In consequence thereof the fixed webs of fabrics cannot adapt themselves sufficiently to the treatment as only the shrinkage in the width of the fabric in the direction of the weft, and not the shrinkage in the longitudinal direction, in the direction of thewarp, is considered. De- 1 vices of this type, are notsuitable for'the mentioned treatment, particularly. for crepmg. The subject matter of, the present invention is a tentering frame which overcomes the above mentioned drawbacks in as much as the bars on which the pin carriers are displaceably mounted are connected to screw threaded sleeves, the latter being adapted to be moved towards and away from each other by means of a hand crank and screw threaded spindles arranged along the side of the frame.

The pin carriers are so shaped that no injuring of the fabric may occur when the pin carriers abut against each other in the course of the treatment of the fabric or already when the latter is fixed to the frame and it is intended to save space; with. the known devices the dyeing liquor has no access to the parts of the fabric present between the. pin carriers. In order to avoid this drawback, according to another feature of the present invention those parts of the pin carriers in which the pins are fixed are made thinner than the other parts of the pin carrier by at 40 least twice the thickness of the fabric.

Furthermore in contradistinction to the known devices the pin carriers are swingably arranged for. the purpose of facilitating the removal of the fabric, whereby the folds 45 on one or both sides of the removed web are maintained, and not for the purpose of tensioning the fixed webs; this tensioning is effected by displacing the bars on which the pin carriers are mounted.

A constructional example of the subject 471,277, and in Germany August a, 1929.

matter of the present invention is illustrated on the accompanying drawings, in which Fig. 1 is a side view of the frame with parts shown in section,

F ig. 2 is a vertical section along line 22 in Fig. 1,

Fig. 3 is a planview of Fig. 1 and Fig. 4 shows details in a perspective view.

Referring now to the drawings the vat 5 is so subdivided by a partition wall 6 that the dyeing liquor may flow below and above the partition wall from one compartment of the vat to the other. The frame 7 is removably placed on the edge of the vat. On the longitudinal part 8 of the frame a shaft 11 adapted to be turned by means of a crank 10 (Fig. 3) is mounted in laterally arranged bearings 9. The turning motion of the shaft 11 is transmitted by means of bevel gearings 12, 13 to left and right hand threaded spindles 14: placed across the vat and turnably mounted in bearings 16 arranged on the longitudinal parts 8 and of the frame. The nuts 17 cooperate with the threaded parts of the spindles 141- and are connected by means of braces 18 to sleeves 19. In the latter the bars 21 of approximately half round cross-section are mounted; the bars may be turned in the sleeves by means of levers 20. On these bars 21 the pin carriers 22' having a bore corresponding to the cross-section of the bar are mounted to be displaceable in the longitudinal direction of the bars. Pins 23 are provided on the outer facing of the pin carriers 22 and the web S is supported by these pins. The nuts 17 are provided with forks 24 pointing in the upward direction, guiderods 25 fixed with their ends in bearings 16 are inserted in the forks 24:. On the transverse connections 27 and 28 of the frame handles 29 are provided.

The web of fabric S is advantageously fixed to the tentering frame when the latter is removed from the vat, to which end serve the handles 29. The web S, as is shown in chaindotted lines in Fig. 3, is placed in zig-zag fashion around the pin carriers 22 of the two bars 21 and is held on its upper edge by the pins 23. Thereby it is intended that the web is held by the longitudinal tension applied to it when it is placed on the pin carriers to prevent a tearing of the Web at the parts where the pins penetrate the fabric. The latter should not be carried by the pins 23 but the 5 pins should only prevent the fabric from slipping off the needle carriers 22. Those faces of the pin carriers 22 on which the pins are arranged are to beplaced vertically-by means of the levers 20 during the fixing of tee web to the frame. After the whole length of the Web has been pinned "tofthe E'frmnethetension in the single folds i. e. in the longitudinal direction (warp) is preferably somewhat increased by distancing the bars 21 from each other by means o'f'the crank 10.

lVhen pinning the web to the frame the-upper longitudinal edgeof he webis placed around :the lower portion :ofthe pin carriers 22 in which the pins 23 are arranged whilst .the upper ,portion of the carriers, which is thicker than the lower portion is not covered by the web. The-magnitudeof the difference in thicknessbetween the upper and thelower ;portions ofthepin carrier .22 ison each --side jofthe latter slightlymore than the thickness of the treated fabrics. This smaller thickness hasnotthe purpose of facilitating-the removal of the fabric hut to give the dyeing liquor unhindered access .to the fabric also when the pin carriers :22 =abutagainst each Qtherns .is shown for two needle carriers in Fig. 4, in which .casethe web does not ,project between the upper portions of the pin carriers and is thus not excluded from the liquor. These relative positions .of the pin carriers may occur dru'ingtheztreatment, for instanceiby the action of the treatment liquor, however the pin carriers may alsobe placed so nearto each other from the very beginningofthe treatment for the purpose of saving space in the vat.

'When .the fabric shrinks owing to the action of the liquor the .above described device permits to .adapt the shr'nikage of the web in the longitudinal direction of the Web to that in the widthwise direction, whereby -in comparison to the known devices .a product of a better quality is obtained in .a very simple manner; as with :the known devices the shrinkage in-the longitudinal :and transverse directions of the web is the same. This adaptation is obtained by adjusting the distance of-the bars 2l-fromceach other-by means of the crank .21 to correspondrto the widtl wise shrinkage of the web, whereby the tension in the longitudinal direction is adjusted to conform with the requiredshrinkage.

The removal of the web from the frame may be .caused by turning the levers 20 so that v the pins are withdrawn from the fabric, whereby the latter sinks towards the bottom of the vat whilst maintaining its fold-- eds-hape provided the flow of the liquor d see not disturb the folds. Further only one of :the levers 20 may be turned sothatthe fabric :ingrcoil's may be -provided in the vat.

I clalm:

'1. A-tentering'frame for the wet-treatment of webs of fabrics, comprising in combination, two oppositely arranged "bars, pin carriers displaceably .arrangedon said bars and :adapted to receive the web of fabric placed in Zig-zag fashion fromthecarriers on one .bar to the carriers of the other bar,

screw threaded bushings to which said :bars

are connected, and screw threaded spindles cooperating with said bushings for altering thedistance of said bars from each other.

2. A tentering frame for the wet-treatment of webs of fabrics, comprising in combination,stwo oppositely arranged bars, pin car- .riers displaceablyarranged on said-bars and adapted to receive the web of fabric placed inrzigezag fashion from the carriers on one .bar to the carriers of the other bar, screw threaded bushings to which said bars are connected, screw threaded spindles cooperating with said bushings, .a shaft arranged along oneside of the frame, .a crank on said shaft, and .means for transmitting the turning'motion of said shaft tosaid screw thread- 'ed spindles for adjusting the distance ofsaid bars from each other.

3. .Atentering frame for the Wet-treatment ofwebs of fabrics, comprising in combination, two turnably mounted bars arranged parallel .to each other, a lever fixed to each bar for turning the latter, pin carriers dis- .placeably arranged on saidbars'and adapted to receive the web of fabric placed in zig-zag fashion from the carriers on one bar to the carriers of the other bar, screw threaded bushings .to which said bars are connected, and screw.threadedspindles cooperating with saidrbushingsfor altering the distance ofsaid bars from each other.

- 4. A tentering frame for the wet-treatment of webs of fabrics, comprising in combination, two turnably mounted .bars arranged parallel to each other, a lever fixed to each bar for turning the latter, pin carriers :arranged on said bars and displaceable in the longitudinal direction of said bars and adapted to receive the web of fabric placed in zigzag fashion from the carriers on one bar to the carriers of the other bar, the portion of the carriers'receiving the web being thinner by at least twice the thickness of the fabric than the other portion, screw threaded bushings to which said bars are connected,

and screw threaded spindles cooperating with said bushings for altering the distance of said bars from each other.

5. A tentering frame for the wet-treatment of webs of fabrics, comprising in combination two oppositely arranged bars, pin carriers displaceably arranged on said bars and adapted to receive the web of fabric placed in zig-zag fashion from the carriers on one bar to the carriers of the other bar, that portion of the pin carriers which is situated between each fold of the fabric being thinner than the portion which is displaceably arranged on the bars, screw threaded bushings to which said bars are connected, screw threaded spindles cooperating with said bushings, a shaft arranged along one side of the frame, a crank on said shaft, and means for transmitting the turning motion of said shaft to said screw threaded spindles for adjusting the distance of said bars from each other.

In testimony whereof I have signed my name to this specification.

EMIL SCHAERER. 

